Tool-holder.



; No. 854,669. I M. 1).. RBIDY.

. TOOL HOL I APPLICATION FILED "Fig-2 3 T Mo7me211 PATENTED MAY 21, 1907.

Ewe HQ? to be held by UNITED STATES PATENT OFFICE.

MICHAEL DLVREIDY, or WORCESTER, MASSACHUSETTS TOOL-HOLDER.

'l'r) all "whom, 111? Ill/[LI] calmer/1 Be it known that I, MionAnL 1). Rainy, a citizen of the United States, and a resident of the city and county of Worcester, in the State of h'lassachiTsetts, have invented certain new and useful Improvements in. Tool- 1 lolders, of which the following is a full, clear, and exact description. a

This invention relates to that type of tool holders for lathes and planers wherein a shank designed to be clamped in the tool post of the machine is adapted to receive small lengths of steel composing the cutting edges; and-the object of this invention is the efi'ccting of means for enabling the tool points such shank at either of two angles,one horizontal, and "the other in the 5O was held by the same at a neighborhood of twenty two degrees.

Referring to the drawings forming part of this specification, Figure 1 is a perspective view of a.tool holder embodying my i111- provements. Fig. 2 is a vertical longitudinal section of the same showing the tool held horizontally thereby. F ig.-3 is a similar sectional view of the main part of the Same showing the tool held at an acute angle. Fig. 4 is an end view of the tool holder. Fig. 5 is a detail view of device used in changing the tool holder to support a tool horizontally. Fig. 6 is a perspective view of one act the small tools used, and Fig. 7,is a perspective view of another such tool for turning square threads.

As shown, the tools are formed from lengths of tool steel rod about three eighths by a quarter of an inch in cross section; some being-made with V-points for turning screwthreads of the usual type {some being square nosed for turning square threads; others given a dian'iond-point l'or turning steel;

others round-nosed for turning cast iron, etc. By having these tool-points as the said parts T, are turned,'as small as practicable in size but of the best of tool-steel, while the compar ativelybulky tool holder 1 may be made from less expensive material, much economy is thereby had. As previously manufactured, however, the heel holders were made wit-ha single slanting opening 2 for the reception of the. tool-point so that the latter wrong angle for many kinds of work.

To adapt the holder for su1' porting the tool points in a horizontal position, while at the same time it may be used for tools held at an angle, I form 'a horizontal opening 3 in Specification of Letters Patent. Application filed June 20, 1906. Sena-1N0. 322,599,

Patented May 21, 1907,.

addition to the angular one, each having practicallythe same mouth, as shown in. Figs. 2 and 3. For retaining the tool pointsin place in either saidppenings, 1 tap the'set screw 10 down through the shoulder 4 in a movable bar 8 for insertion in the opening 2,

having its upper end culpat an acute angle to constitute a surface continuous with said floor. This bar or block being inserted, the toolholder becomes practically as though adapted for the horizontalpositioning of a tool point exclusively. By having a small set screw 12 tapped through the partition5 which separates the opening 2 from an external recess 7 substantially in line therewith, the block 8 is adjusted to exactly the true position to adapt it for the designed purpose.

Inasmuch as bi ts of metal occasionally become clogged in the space about a tool point, and so wedge it in place as to prevent its withdrawal, I form the opening 3 with a hole 6 at its rear end, through which a wire or suitable. device can be introduced l' or forcing the tool point out. The said hole also enables any dirt or shavings to be blown out from the opening preparatory to the insertion of a tool point.

in the manufacture of these tool holders I prefer to cast the same from semi-steel, with the various cavitiestherein suitably cored. 'lhismethod 1 find to be fully enough accurate, and at the same time permits me to produce the hhlder at the Ininimumot-expense.

in using the tool holder, .the block 8 is placed in either opening 2 or 3 which is not to be. put into service. When laced in the opening or pocket 2, said bloc is of course en'iployed as an auxiliary support to the toolpoint '1; but it-is put in the pocket 3 only for I reventing 1ts being nuslaid or IIO wedged the tool T firmly up against the upper surfaceof the cavity or pocket 3. 'lhe screw may then be set down firmly agamst,

the tool, it it is wished to make it doubly rigid; but even without the screw 10, thetool Wlll be held with great rigidity sin'ee it is clamped between two flat surfaces extendingto the very mouth of the cavityor pocket 3.

1. In a tool holder, a'shankiormed with two pockets of equalcross-sectional areas so that each may receive the tool having their external IIlOlltllS coincident, but one pocket forming an acute angle with the other, in combination wlth a set screw tapped into the shank or holder near said mouth.

2. In a tool holder, a shank formed with two pockets of equalcross-section'al areas so' ihat each may'receive the toolhaving their mouths coincident but,one pocket forming an acute angle with the other, in combinatlon with a set-screw tapped 1n'Lo the shank or holder at right angles to a plane bisecting theangle formed by said pockets.

3. The combination in a tool' holder, of a shank formed with two pockets of equal. cross-sectional areas so that each may re-' such tool.

4. The combination in a tool holder, of a shank'formed with two pockets of equal cross-sectional areas so that eaeh'mayreceive' the tool, said pockets making an acute angle with each other, a set screw tapped into the shank close above the juncture of said pockets, a removable block located in 'the lower pocket with its upper. end made flush with the floor of the upper ocket, and means for adjusting the longitudinal position of said block; I p In testimony thatI claim the foregoing inventio'n, I have hereunto set my hand this 16th day of- June, 1906;,-

MICHAEL D. REIDY.

Witnesses: I

'FREDERIC IQBLAKE, ALICE M. BLAKE. 

